CN216894246U - Horizontal well type structure suitable for multi-point obstacle avoidance in pit - Google Patents
Horizontal well type structure suitable for multi-point obstacle avoidance in pit Download PDFInfo
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- CN216894246U CN216894246U CN202122967566.XU CN202122967566U CN216894246U CN 216894246 U CN216894246 U CN 216894246U CN 202122967566 U CN202122967566 U CN 202122967566U CN 216894246 U CN216894246 U CN 216894246U
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Abstract
The utility model relates to a horizontal well type structure suitable for underground multi-point obstacle avoidance, which comprises an obstacle avoidance section track and a middle target section track which are sequentially connected from a well head to the bottom, wherein the obstacle avoidance section track comprises a first straight well section, an obstacle avoidance deflecting section and an obstacle avoidance deflecting section which are sequentially connected, and the number of the obstacle avoidance section tracks is more than or equal to 1; the middle target section track comprises an adjusting straight well section, a window entering inclined section and a horizontal section which are connected in sequence; the adjusting straight well section, the window entering inclined section and the horizontal section are located on the same plane, the direction of the window entering inclined section is the same as that of the horizontal section, target-in-track operation is achieved, and the well track is smoother. If the well is a two-dimensional horizontal well, the orientation of the obstacle detouring and deflecting section and the orientation of the obstacle detouring and deflecting section are the same as the orientation of the horizontal section; if the well is a three-dimensional horizontal well, the orientation of the obstacle-detouring and deflecting section faces the orientation of the horizontal section, the included angle between the obstacle-detouring and deflecting section and the orientation of the horizontal section is an acute angle, and the orientation of the obstacle-detouring and deflecting section is the same as the orientation of the horizontal section. The utility model ensures the high-efficiency drilling operation.
Description
Technical Field
The utility model belongs to the technical field of drilling, and relates to a horizontal well type structure suitable for underground multi-point obstacle avoidance.
Background
With the continuous promotion of the exploration and development process of the oil field, the number of cluster wells and encrypted wells at home and abroad is continuously increased, the number of encrypted wells and adjusted wells in old oil fields is increased, the scale of a newly-built cluster well group is increased, and the space distance between wells is decreased, so that higher requirements are provided for anti-collision design and well drilling construction operation under the condition of a dense well pattern, and the occurrence of collision accidents of a drilling well and a drilled well hole in the drilling process causes the damage of a sleeve and even the complete abandonment of the whole well.
In order to avoid the occurrence of a collision accident of a well bore, a more accurate design of a drilling anti-collision track is needed, the existing design of the drilling anti-collision track is mainly aimed at the underground single risk well anti-collision, a design method of anti-collision with a beveled edge is generally adopted, in order to avoid the collision risk of the well bore, even the process of deflecting is additionally provided with a twisting azimuth operation, the track control difficulty is high, even if the anti-collision operation is successful, the track of the well bore is not smooth, and the engineering risk is increased for the subsequent construction.
Disclosure of Invention
Aiming at the problems, the utility model provides a horizontal well type structure which adopts the small well deviation to detour in advance and adjusts the well direction after detouring, thereby ensuring the smoothness of the well track while realizing the safe detouring operation of a plurality of underground risk wells and ensuring the efficient drilling operation.
The technical scheme of the utility model is as follows:
a horizontal well type structure suitable for underground multi-point obstacle detouring comprises an obstacle detouring section track and a middle target section track which are sequentially connected from a well head to the bottom, wherein the obstacle detouring section track comprises a first straight well section, an obstacle detouring and deflecting section and an obstacle detouring and deflecting section which are sequentially connected, and the number of the obstacle detouring section tracks is more than or equal to 1; the middle target section track comprises an adjusting straight well section, a window entering inclined section and a horizontal section which are connected in sequence; the adjusting straight well section, the window-entering inclined section and the horizontal section are located on the same plane, the direction of the window-entering inclined section is the same as that of the horizontal section, target-in operation of the two-dimensional track is achieved, and the well track is smoother.
If the well is a two-dimensional horizontal well, the orientations of the obstacle-detouring and deflecting section and the obstacle-detouring and deflecting section are the same as the orientation of the horizontal section;
if the well is a three-dimensional horizontal well, the orientation of the obstacle-detouring and deflecting section faces the orientation of the horizontal section, an included angle between the obstacle-detouring and deflecting section and the orientation of the horizontal section is an acute angle, and the orientation of the obstacle-detouring and deflecting section is the same as the orientation of the horizontal section.
Preferably, a barrier-bypassing oblique-making section and a barrier-bypassing oblique-lowering section are arranged between the barrier-bypassing oblique-making section and the barrier-bypassing oblique-lowering section.
The range of the barrier-bypassing deflecting section deflecting rate a of the barrier-bypassing deflecting section is 3 degrees/30 m and is less than or equal to 5 degrees/30 m, the maximum well deviation angle of the barrier-bypassing deflecting section is less than or equal to 25 degrees, and well deviation adjustment is facilitated.
The range of the build-up rate b of the obstacle-detouring and slope-descending section is 3 degrees/30 m and less than or equal to b and less than or equal to 5 degrees/30 m, the minimum well inclination angle of the obstacle-detouring and slope-descending section is 0 degree, and the subsequent well section can be ensured to rapidly realize the torsional azimuth operation.
The range of a stable inclination angle c of the obstacle-detouring stable inclination section is more than or equal to 15 degrees and less than or equal to 25 degrees, the stable inclination operation is carried out within the angle range, the azimuth drift of a well is not easy to occur in the drilling process, and the obstacle-detouring operation precision is ensured. The length L of the stable inclined section is more than or equal to 10 and less than or equal to 20 m.
The utility model has the technical effects that:
according to the utility model, the small well deviation is adopted to carry out obstacle detouring in advance, the well direction is adjusted after the obstacle detouring, the two-dimensional track target-in-track operation is realized, the safety obstacle detouring operation of a plurality of underground risk wells is realized, the smoothness of well tracks is ensured, and the efficient operation of well drilling is ensured.
Drawings
Fig. 1 is a schematic structural view of a horizontal well type with one-time obstacle avoidance according to an embodiment of the utility model.
FIG. 2 is a schematic diagram of a horizontal well type structure of the secondary obstacle detouring in the embodiment of the utility model.
Reference numerals: 1-a first straight well section, 2-a first obstacle-detouring and deflecting section, 3-a first obstacle-detouring and deflecting section, 4-an adjusting straight well section, 5-a window-entering and deflecting section, 6-a horizontal section, 11-a second straight well section, 12-a second obstacle-detouring and deflecting section, and 13-a second obstacle-detouring and deflecting section.
Detailed Description
Example 1 a primary detouring horizontal well pattern structure suitable for a downhole multi-point detouring horizontal well pattern structure, as shown in fig. 1: comprises a barrier-surrounding section track and a middle target section track which are sequentially connected from the wellhead downwards; the obstacle detouring section track comprises a first straight well section 1, an obstacle detouring inclined section and an obstacle detouring and inclining section which are sequentially connected, and the number of the obstacle detouring section tracks is 1; the middle target section track comprises an adjusting straight well section 4, a window entering inclined section 5 and a horizontal section 6 which are connected in sequence; the vertical well section 4, the window entry deflecting section 5 and the horizontal section 6 are adjusted to be positioned on the same plane, and the direction of the window entry deflecting section 5 is the same as that of the horizontal section 6;
if the well is a two-dimensional horizontal well, the orientations of the obstacle-detouring and deflecting section and the obstacle-detouring and deflecting section are the same as the orientation of the horizontal section 6;
if the well is a three-dimensional horizontal well, the direction of the obstacle-detouring and deflecting section faces the direction of the horizontal section 6, the included angle between the obstacle-detouring and deflecting section and the direction of the horizontal section 6 is an acute angle, and the direction of the obstacle-detouring and deflecting section is the same as the direction of the horizontal section 6.
Example 2
A secondary obstacle detouring horizontal well type structure suitable for a downhole multi-point obstacle detouring horizontal well type structure, as shown in fig. 2: comprises a barrier-surrounding section track and a middle target section track which are sequentially connected from the wellhead downwards; the barrier-bypassing section track comprises a first straight well section 1, a first barrier-bypassing and deflecting section 2, a first barrier-bypassing and deflecting section 3, a second straight well section 11, a second barrier-bypassing and deflecting section 12 and a second barrier-bypassing and deflecting section 13 which are sequentially connected; the middle target section track comprises an adjusting straight well section 4, a window entering inclined section 5 and a horizontal section 6 which are connected in sequence, and a second obstacle-detouring inclined section 13 is connected with the adjusting straight well section 4.
If the well is a two-dimensional horizontal well, the orientations of the obstacle-detouring and deflecting section and the obstacle-detouring and deflecting section are the same as the orientation of the horizontal section 6;
if the well is a three-dimensional horizontal well, the direction of the obstacle-detouring and deflecting section faces the direction of the horizontal section 6, the included angle between the obstacle-detouring and deflecting section and the direction of the horizontal section 6 is an acute angle, and the direction of the obstacle-detouring and deflecting section is the same as the direction of the horizontal section 6.
Example 3
On the basis of embodiment 1, the method further comprises the following steps: and barrier-bypassing oblique sections are arranged among the barrier-bypassing oblique section, the first barrier-bypassing oblique section 2, the first barrier-bypassing oblique section 3, the second barrier-bypassing oblique section 12 and the second barrier-bypassing oblique section 13.
Example 4
On the basis of embodiment 3, the method further comprises the following steps:
the range of the barrier-bypassing deflecting segment deflecting rate a of the barrier-bypassing deflecting segment is 3 degrees/30 m-5 degrees/30 m, and the maximum oblique angle of the barrier-bypassing deflecting segment is 25 degrees or less. The range of the build-up rate b of the obstacle-detouring and slope-descending section is 3 degrees/30 m-5 degrees/30 m, and the minimum well-head angle of the obstacle-detouring and slope-descending section is 0 degree. The range of a stable inclination angle c of the obstacle-detouring stable inclination section is more than or equal to 15 degrees and less than or equal to 25 degrees, and the length L of the stable inclination section is more than or equal to 10 degrees and less than or equal to 20 m.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (5)
1. The utility model provides a horizontal well type structure suitable for multi-point obstacle avoidance in pit which characterized in that: the obstacle detouring section track comprises an obstacle detouring section track and a middle target section track which are sequentially connected from the wellhead downwards, wherein the obstacle detouring section track comprises a first straight well section (1), an obstacle detouring inclined section and an obstacle detouring inclined section which are sequentially connected, and the number of the obstacle detouring section tracks is more than or equal to 1; the middle target section track comprises an adjusting straight well section (4), a window entering inclined section (5) and a horizontal section (6) which are connected in sequence; the adjusting straight well section (4), the window entry deflecting section (5) and the horizontal section (6) are positioned on the same plane, and the direction of the window entry deflecting section (5) is the same as that of the horizontal section (6);
if the well is a two-dimensional horizontal well, the orientations of the obstacle-detouring and deflecting section and the obstacle-detouring and deflecting section are the same as the orientation of the horizontal section (6);
if the well is a three-dimensional horizontal well, the obstacle-detouring and deflecting section is oriented to the horizontal section (6) and forms an acute angle with the horizontal section (6), and the obstacle-detouring and deflecting section is oriented to the horizontal section (6) in the same direction.
2. The horizontal well type structure suitable for multi-point obstacle avoidance in a well according to claim 1, wherein: and a barrier-bypassing oblique-stabilizing section is arranged between the barrier-bypassing oblique-making section and the barrier-bypassing oblique-lowering section.
3. The horizontal well type structure suitable for multi-point obstacle avoidance in a well according to claim 2, wherein: the range of the barrier-bypassing deflecting segment deflecting rate a of the barrier-bypassing deflecting segment is 3 degrees/30 m-5 degrees/30 m, and the maximum oblique angle of the barrier-bypassing deflecting segment is 25 degrees or less.
4. The horizontal well type structure suitable for multi-point obstacle avoidance in a well according to claim 2, wherein: the range of the build-up rate b of the obstacle-detouring and slope-descending section is 3 degrees/30 m-5 degrees/30 m, and the minimum well-head angle of the obstacle-detouring and slope-descending section is 0 degree.
5. The horizontal well type structure suitable for multi-point obstacle avoidance in a well according to claim 2, wherein: the stable inclination angle c of the obstacle-detouring stable inclination section is more than or equal to 15 degrees and less than or equal to 25 degrees, and the length L of the stable inclination section is more than or equal to 10 degrees and less than or equal to 20 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122967566.XU CN216894246U (en) | 2021-11-30 | 2021-11-30 | Horizontal well type structure suitable for multi-point obstacle avoidance in pit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122967566.XU CN216894246U (en) | 2021-11-30 | 2021-11-30 | Horizontal well type structure suitable for multi-point obstacle avoidance in pit |
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| Publication Number | Publication Date |
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| CN216894246U true CN216894246U (en) | 2022-07-05 |
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| CN202122967566.XU Active CN216894246U (en) | 2021-11-30 | 2021-11-30 | Horizontal well type structure suitable for multi-point obstacle avoidance in pit |
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2021
- 2021-11-30 CN CN202122967566.XU patent/CN216894246U/en active Active
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